Okla. Stat. tit. 45, § 45-511: Inspection of hoisting equipment and stairs

The ropes, chains, machinery and all of its connections used

for lowering or raising the employees into or out of the mines, and

the stairs used for ingress and egress shall be kept in a safe

condition, and inspected once every twenty-four (24) hours by a

competent person provided by the mine operator for that purpose, who

shall make a daily record of such inspection in a book provided for

that purpose, and such machinery and the method of its inspection

shall be approved by the mine inspector of the district in which the

mine is situated.